I think the "corporate-owned" piece is a misnomer. I think what they mean to say is that they are commercial operations, rather than individuals making use of extra space that they already had in their homes.

If someone buys or rents a property that is bigger than they need, for the sole purpose of AirBnB-ing the extra space, that is a commercial mini-hotel.

In some jurisdictions this is probably a good thing, where you don't have the tourism volume to warrant building a proper hotel but where there is demand for tourism accomodations; in other jurisdictions it represents a wantonly inefficient use of real estate resources.